/* CSS Design System for Grains Landing Page */

:root {
  /* Colors */
  --bg-primary: hsl(225, 24%, 6%);
  --bg-secondary: hsl(225, 24%, 9%);
  --bg-alternative: hsl(225, 24%, 11%);
  
  --color-gold: hsl(40, 62%, 69%); /* #E3C17A */
  --color-gold-light: hsl(40, 62%, 78%);
  --color-gold-dark: hsl(40, 62%, 52%);
  --color-gold-rgb: 227, 193, 122;
  
  --color-focus: hsl(45, 90%, 58%);      /* Warm Amber */
  --color-hands: hsl(12, 75%, 60%);      /* Terracotta Coral */
  --color-connection: hsl(165, 52%, 53%); /* Sage Teal */
  --color-solitude: hsl(255, 60%, 75%);   /* Lavender */

  --color-text-main: hsl(0, 0%, 96%);
  --color-text-sub: hsl(225, 12%, 72%);
  --color-text-muted: hsl(225, 8%, 52%);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-focus: rgba(227, 193, 122, 0.25);
  --glass-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  --glass-radius: 20px;
  
  /* Fonts */
  --font-main: 'Outfit', sans-serif;
  --font-serif: 'Playfair Display', serif;
}

/* Base resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-main);
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

/* Typography */
h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 24px;
}

h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 12px;
}

h4 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 12px;
}

p {
  color: var(--color-text-sub);
  font-size: 1.05rem;
}

.accent-text {
  color: var(--color-gold);
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-center {
  text-align: center;
}

.justify-center {
  justify-content: center;
}

.section-padding {
  padding: clamp(60px, 10vw, 120px) 0;
}

.alternative-bg {
  background-color: var(--bg-secondary);
}

.section-header {
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-desc {
  font-size: 1.15rem;
  margin-top: 8px;
}

/* Glass panel */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow);
  padding: 35px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.glass-panel:hover {
  border-color: rgba(227, 193, 122, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  border: none;
  font-size: 1.05rem;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.95rem;
  border-radius: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: hsl(225, 24%, 4%);
  box-shadow: 0 4px 20px rgba(227, 193, 122, 0.25);
}

.btn-primary:hover:not(.btn-disabled) {
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(227, 193, 122, 0.35);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--color-text-main);
}

.btn-secondary:hover:not(.btn-disabled) {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-block {
  display: flex;
  justify-content: center;
  width: 100%;
}

.btn-disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-icon {
  font-size: 1.3rem;
}

.btn-text-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.btn-subtext {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

.btn-maintext {
  font-size: 1rem;
  font-weight: 700;
}

.badge-pill {
  display: inline-block;
  background: rgba(227, 193, 122, 0.08);
  border: 1px solid rgba(227, 193, 122, 0.25);
  color: var(--color-gold);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

/* Header */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(11, 13, 23, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.brand-name {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-sub);
}

.nav-links a:hover {
  color: var(--color-gold);
}

/* Hero Section */
#hero {
  position: relative;
  padding-top: 160px;
  padding-bottom: 80px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-bg-glow {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(circle, rgba(227, 193, 122, 0.06) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Floating CSS Glass Jar animation details */
.glass-jar-container {
  position: relative;
  width: 250px;
  height: 380px;
  animation: floatJar 6s ease-in-out infinite;
}

.glass-jar-lid {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 25px;
  background: linear-gradient(90deg, #A88F5B, #E3C17A, #A88F5B);
  border-radius: 8px 8px 4px 4px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  z-index: 2;
}

.glass-jar {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 220px;
  height: 340px;
  background: rgba(255, 255, 255, 0.03);
  border: 4px solid rgba(255, 255, 255, 0.18);
  border-radius: 40px 40px 30px 30px;
  box-shadow: inset 0 20px 40px rgba(255,255,255,0.05),
              inset 0 -20px 40px rgba(0,0,0,0.5),
              0 30px 60px rgba(0,0,0,0.4);
  overflow: hidden;
  z-index: 1;
}

.jar-shine {
  position: absolute;
  top: 0;
  left: 15px;
  width: 15px;
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,0.08), transparent);
  border-radius: 40px 0 0 30px;
}

.glass-jar-base {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 170px;
  height: 8px;
  background: rgba(0,0,0,0.5);
  filter: blur(4px);
  z-index: 0;
}

/* Floating grain style */
.floating-grain {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  filter: brightness(1.1);
  animation: hoverGrain 4s ease-in-out infinite;
}

.floating-grain:nth-child(even) {
  animation-duration: 5s;
  animation-delay: 1s;
}

.floating-grain:nth-child(3n) {
  animation-duration: 3.5s;
  animation-delay: 0.5s;
}

.grain-hands {
  background-color: var(--color-hands);
  box-shadow: 0 0 10px rgba(228, 92, 60, 0.3);
}

.grain-focus {
  background-color: var(--color-focus);
  box-shadow: 0 0 10px rgba(235, 175, 45, 0.3);
}

.grain-connection {
  background-color: var(--color-connection);
  box-shadow: 0 0 10px rgba(65, 205, 165, 0.3);
}

.grain-solitude {
  background-color: var(--color-solitude);
  box-shadow: 0 0 10px rgba(180, 160, 245, 0.3);
}

@keyframes floatJar {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes hoverGrain {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-6px) scale(1.05); }
}

/* Demo Section */
.demo-card-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.demo-controls h3 {
  margin-bottom: 24px;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 16px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.95rem;
  color: var(--color-text-sub);
  margin-bottom: 10px;
  font-weight: 500;
}

.sphere-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.sphere-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  color: var(--color-text-sub);
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-main);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s ease;
}

.sphere-btn:hover {
  background: var(--glass-bg-hover);
  color: var(--color-text-main);
}

.sphere-btn.active {
  background: rgba(227, 193, 122, 0.08);
  border-color: var(--color-gold);
  color: var(--color-text-main);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot-focus { background-color: var(--color-focus); }
.dot-hands { background-color: var(--color-hands); }
.dot-connection { background-color: var(--color-connection); }
.dot-solitude { background-color: var(--color-solitude); }

#activity-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--glass-border);
  color: var(--color-text-main);
  padding: 12px 16px;
  border-radius: 8px;
  font-family: var(--font-main);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

#activity-input:focus {
  outline: none;
  border-color: var(--color-gold);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-gold);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(227, 193, 122, 0.5);
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.demo-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
  border-top: 1px solid var(--glass-border);
  padding-top: 24px;
}

.stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-gold);
  font-family: var(--font-serif);
}

.stat-lbl {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Demo Jar View */
.demo-jar-view {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 480px;
  position: relative;
  overflow: hidden;
}

.interactive-jar-wrapper {
  position: relative;
  width: 280px;
  height: 380px;
}

.jar-spill-zone {
  position: absolute;
  top: -20px;
  left: 0;
  width: 100%;
  height: 20px;
  pointer-events: none;
}

.interactive-jar {
  width: 100%;
  height: 100%;
  position: relative;
}

.interactive-jar-lid {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 160px;
  height: 25px;
  background: linear-gradient(90deg, #A88F5B, #E3C17A, #A88F5B);
  border-radius: 8px 8px 4px 4px;
  z-index: 2;
}

.jar-body {
  position: absolute;
  top: 22px;
  left: 0;
  width: 100%;
  height: 358px;
  background: rgba(255, 255, 255, 0.02);
  border: 5px solid rgba(255, 255, 255, 0.15);
  border-top: none;
  border-radius: 0 0 50px 50px;
  box-shadow: inset 0 20px 40px rgba(255,255,255,0.03),
              inset 0 -30px 60px rgba(0,0,0,0.6);
  z-index: 1;
}

.jar-glass-shine {
  position: absolute;
  top: 0;
  left: 15px;
  width: 20px;
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,0.06), transparent);
  border-radius: 0 0 0 50px;
  pointer-events: none;
  z-index: 3;
}

/* Physics-simulated Grain in demo */
.phys-grain {
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  filter: brightness(1.05);
  z-index: 2;
  transition: transform 0.1s ease;
}

.jar-toast {
  position: absolute;
  bottom: 24px;
  background: rgba(227, 193, 122, 0.95);
  color: #0b0d17;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(227, 193, 122, 0.4);
  font-size: 0.95rem;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 10;
}

.jar-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Grain Drop Keyframes */
@keyframes dropGrain {
  0% {
    transform: translateY(-280px) scale(0.6);
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  70% {
    transform: translateY(0) scale(1.05);
  }
  80% {
    transform: translateY(-15px) scale(0.95);
  }
  90% {
    transform: translateY(0) scale(1.02);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

/* Spheres section */
.spheres-tabs-container {
  max-width: 900px;
  margin: 0 auto;
}

.spheres-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  padding: 6px;
  border-radius: 12px;
}

.sphere-tab {
  flex: 1;
  background: transparent;
  border: none;
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-sub);
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.sphere-tab:hover {
  color: var(--color-text-main);
}

.sphere-tab.active {
  background: rgba(227, 193, 122, 0.12);
  border: 1px solid rgba(227, 193, 122, 0.3);
  color: var(--color-gold);
}

.spheres-tab-content {
  position: relative;
  min-height: 400px;
}

.tab-pane {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0s 0.35s;
}

.tab-pane.active {
  position: relative;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.45s ease, transform 0.45s ease, visibility 0s 0s;
}

.tab-pane-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: center;
}

.sphere-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.badge-focus { background: rgba(235, 175, 45, 0.15); color: var(--color-focus); }
.badge-hands { background: rgba(228, 92, 60, 0.15); color: var(--color-hands); }
.badge-connection { background: rgba(65, 205, 165, 0.15); color: var(--color-connection); }
.badge-solitude { background: rgba(180, 160, 245, 0.15); color: var(--color-solitude); }

.tab-pane-info h3 {
  font-size: 2.2rem;
  font-family: var(--font-serif);
  margin-bottom: 16px;
}

.tab-pane-info p {
  font-size: 1.15rem;
  margin-bottom: 28px;
}

.suggestion-list h4 {
  color: var(--color-text-main);
  margin-bottom: 16px;
}

.suggestion-list ul {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.suggestion-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-sub);
  font-size: 0.95rem;
}

.check-icon {
  color: var(--color-gold);
  font-weight: 700;
}

.tab-pane-graphic {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 280px;
  border-radius: var(--glass-radius);
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.tab-pane-graphic.focus-theme { background: linear-gradient(135deg, rgba(235,175,45,0.06), rgba(0,0,0,0.6)); }
.tab-pane-graphic.hands-theme { background: linear-gradient(135deg, rgba(228,92,60,0.06), rgba(0,0,0,0.6)); }
.tab-pane-graphic.connection-theme { background: linear-gradient(135deg, rgba(65,205,165,0.06), rgba(0,0,0,0.6)); }
.tab-pane-graphic.solitude-theme { background: linear-gradient(135deg, rgba(180,160,245,0.06), rgba(0,0,0,0.6)); }

.abstract-shape {
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%;
  filter: blur(15px);
  opacity: 0.25;
  animation: blobShape 8s ease-in-out infinite;
}

.focus-theme .abstract-shape { background: var(--color-focus); }
.hands-theme .abstract-shape { background: var(--color-hands); }
.connection-theme .abstract-shape { background: var(--color-connection); }
.solitude-theme .abstract-shape { background: var(--color-solitude); }

.graphic-icon {
  font-size: 4.5rem;
  z-index: 1;
  filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3));
}

@keyframes blobShape {
  0%, 100% { border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%; transform: scale(1); }
  50% { border-radius: 55% 45% 48% 52% / 54% 52% 48% 46%; transform: scale(1.15) rotate(45deg); }
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.feature-card {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 20px;
  background: rgba(227, 193, 122, 0.08);
  width: 56px;
  height: 56px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 12px;
}

/* App Showcase Devices */
.showcase-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 80px;
  margin-top: 40px;
}

.device-showcase {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.device-frame {
  background: #0B0D17;
  border: 10px solid #1f2235;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.ios-frame {
  width: 270px;
  height: 560px;
  border-radius: 40px;
  border-width: 12px;
}

.android-frame {
  width: 275px;
  height: 560px;
  border-radius: 35px;
  border-width: 10px;
}

.device-screen {
  flex: 1;
  width: 100%;
  overflow: hidden;
  background: #000;
  position: relative;
}

.screenshot-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.device-frame:hover .screenshot-img {
  transform: scale(1.03);
}

.device-home-indicator {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 4px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 2px;
}

.device-home-button {
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 4px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 2px;
}

.device-lbl {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-sub);
}

/* Call to Action */
.cta-card {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 40px;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  bottom: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 60%;
  background: radial-gradient(circle, rgba(227, 193, 122, 0.08) 0%, transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.cta-card h2 {
  margin-bottom: 16px;
}

.cta-card p {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 35px;
}

/* Footer */
footer {
  background-color: hsl(225, 24%, 3%);
  border-top: 1px solid var(--glass-border);
  padding: 80px 0 40px;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-left {
  max-width: 400px;
}

.footer-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-left p {
  margin-top: 18px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: 80px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-main);
  margin-bottom: 8px;
}

.footer-col a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.footer-col a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 30px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Mobile Responsiveness */
@media (max-width: 991px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .demo-card-grid {
    grid-template-columns: 1fr;
  }
  
  .tab-pane-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .tab-pane-graphic {
    height: 220px;
    grid-row: 1; /* Move graphic to top on mobile */
  }
  
  .footer-container {
    flex-direction: column;
    gap: 40px;
  }
  
  .footer-links {
    gap: 60px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Simplification for mobile header */
  }
  
  .spheres-tabs {
    flex-wrap: wrap;
  }
  
  .sphere-tab {
    flex-basis: 45%;
    padding: 10px 14px;
    font-size: 0.95rem;
  }
  
  .suggestion-list ul {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 30px;
  }
}